Pump



J. W. PALMER Feb. l1, 1969 PUMP Filed May 2, 1966 Shee't J. W. PALMER Feb. 11,1969

PUMP

Sheet f2 of 2 Filed May 2, 1966 w 96W M y/ u No w /f. W@ n w, l w, 9% un :u 7. \\|M/ W n United States Patent O 3,426,693 PUMP John W. Palmer, 7026 Sarpy Ave., Omaha, Nebr. 68147 Filed May 2, 1966, Ser. No. 546,789 U.S. Cl. 103-121 Int. Cl. F04c 3/ 00 3 Claims ABSTRACT OF THE DISCLOSURE This invention relates to a pump and in particular to a hydr-aulic pump.

In conventional Vane pumps a ring is provided which is l stationary and vanes carried by a rotor slide against the ring and thereby cause considerable wear. This wear is especially severe in conventional pumps operating with fire resistant hydraulic fluids 4at over 2000 p.s.i. pressure.

The pump of this invention however, differs from the conventional vane pumps in that the ring aswell as the rotor rotates. Additionally, the rotor and the ring support both ends of each of the vanes. The pump drive shaft is connected to the rotor and drives the outer ring by four eccentrics. The "eccentrics compensate for the ot center condition of the rring as it rotates on a different center than the rotor and shaft. Since the rotor is positioned eccentrically relative to the ring, rotation of the rotor and ring causes the openings between the rotor ring to gradually increase in one half of the pump and decrease in the other half of the pump. The area and volume between the vanes is increasing on one side of the pump and decreasing on the other and thus a pumping action that creates a suction on the inlet port and a pressure at the outlet port is provided.

The pump of this design is believed capable of operation at higher r.p.m.s and higher pressure than conventional vane-type pumps. Also, the principal of this pump can be used for iluid motors and with modications for rotary internal combustion engines.

This invention consists in the construction, arrangements, and combination of the various parts of the device whereby the purposes contemplated are attained as hereinafter more fully set forth, specifically pointed out in the claims, and illustrated in the accompanying drawings in which:

FIG. 1 is a transverse cross-sectional view taken along line 1 1 in FIG. 2;

FIG. 2 is an elevational view taken along line 2 2 in FIG. l;

FIG. 3 is a fragmentary elevational cross-sectional view taken along line 3 3 in FIG. l;

FIG. 4 is a bottom plan view of the pump device; and

FIG. 5 is a cross-sectional elevational view taken lalong line 5 5 in FIG. 1.

The pump of this invention is generally referred to by the reference numeral in FIG. 2 and includes a housing 12 having a top half 14 secured to a bottom half 16 by bolts 18.

The bottom housing half 16 includes a pair of bosses 20 `and 22 secured to its outer surface by bolts 24. An outlet opening 26 is formed through the boss 20 into the bottom half housing 16 and an inlet opening 28 is similarly yformed through the boss 22 into the bottom hal-f housing 16. A pair of segmental annular cavities 30 and 32 are 3,426,693 Patented Feb. l1, 1969 formed in the housing half 16 along its inner surface which is provided with `an annular recess 34 to receive a rotor and ring bottom cover plate 36. A pin 38 interconnects the bottom plate 36 (FIG. 5) to the bottom half housing 16 to prevent the bottom plate 36 from rotating within the housing. A pair of annular or crescent-shaped openings 40 `and 42 are formed in the bottom cover plate 34 in alignment with the cavities 30y and 32 respectively.

A center recess 44 is provided in the bottom housing half 16 and is provided with a roller bearing 46 for embracing a stulb shaft 48 on the bottom side of a rotor 50.

Equally spaced around the periphery of the rotor 50 are a plurality o-f inwardly converging slots 52 which communicate with circular holes 54. A vane element 56 is positioned in each of the slots and openings 52 and 54 and are permitted to pivot between a pair of semi cylindrical pins 58 positioned in the hole 54.

An outer ring 60 is disposed around a rotor 50 and `also has a plurality of slots 62 with sidewalls which converge inwardly towards circular holes 64. A pair of semi cylindrical pins 66 are positioned in the holes 64 on opposite sides of the adjacent end of the vanes 56. As seen in FIG. #1, the vanes 56 extend across a passageway 68 having a substantial width on one side and negligible width on the opposite side. The vanes 56 being free to move between the pins 66 are capable of readily adjusting to the changing conditions.

A roller bearing unit 70 is press-fitted into the top housing half 14 and matingly engages along its inner peripheral surface of the ring 60. A ring and rotor top cover plate 72 is rigidly fastened to the rotor 50 by pins 74 and bolts 76 as seen in FIG. 5. An annular plate bushing 7 8 is provided on top of the top cover plate 72 and is fitted into an annular recess 80 formed in the inner surface of the top housing half 14. An input drive shaft 82 is integral with the top cover plate 72 and extends outwardly through the top half housing 14. A seal 84 and a roller bearing unit 86 are mounted in the top half housing 14 around the drive shaft 82.

The outer ring 60 is provided with a plurality of drive pins 90 rigidly held for movable engagement in enlarged circular holes 92 formed directly :above in the top cover wear plate 72.

As seen in FIG. 1, by the 4radial arrows 96 and 98 the center longitudinal axis of the input shaft 82 is the radial center for the bearing 70 in the housing half 14 and the outer peripheral surface, of the rotor 50. The radial center at for the inner and outer peripheral surfaces of the ring 60 as indicated `by the radial arrows 102 and 104 is oiset from the longitudinal centeraxis of the shaft 82. Thus, the annular passageway 68 is formed between the rotor S0 and the outer ring 60.

In operation, it is seen that the drive shaft 82 turns the cover plate 72 and the rotor 50 connected directly thereto. The outer ring 60 is rotated by the drive pins 90 positioned in the enlarged holes 92 formed in the top plate 72. Accordingly, when the pump is rotated clockwise as indicated by the arrow in FIG. 1, the vanes 56 will suck in fluid from the cavity 32 through the inlet opening 28 and pump it into the cavity 30 as the pump continues to rotate whereupon it is exited to the oulet opening 26. I is to be appreciated that the pump -could be rotated in either direction and the inlet and outlet ports would be reversed. It is thus appreciated that the normal wear in conventional pumps is eliminated since the vanes 56 d0 not contact lor wipe at their ends against a surface between which a seal is required. The rotor 60 is in continuous frictional rotational contact with the roller bearing unit 70. The drive pins 90 in the enlarged circular holes 92 compensate for the eccentric condition of the rotor and ring Aand serve to take the driving pressure olf of the vanes 56 which move uid from the inlet cavity 32 tothe outlet cavity 30.

Some changes may be made in the construction and arrangement oat my pump without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

1. A pump comprising,

a housing,

a drive shaft with a rotor mounted in said housing,

a ring loosely embracing said rotor to form an annular passageway therebetween,

a plurality of vanes extending across said passageway and connected to said rotor and said ring,

said housing having inlet and outlet openings in communication with said passageway,

the radius of curvature of the outer su-rface of said rotor is from the center longitudinal axis of said drive shaft, and the radius of curvature of the inner surface of said housing around said ring :and the radius of curvature of the inner surface of said ring are from an axis offset from said center axis of said shaft whereby said ring is adapted to rotate about said oset axis and said rotor is adapted to rotate about said center shaft axis,

said ring is provided with a plurality of upstanding drive pins along its peripheral length, a cover plate is secured to said drive shaft and is provided with a plurality of openings, said pins being disposed in said openings and said openings being substantially larger than said pins to permit relative movement therebetween as said rotor is rotated, said drive pins being adapted to rotate said ring, and said cover plate is rigidly secured to said rotor.

2. The structure of claim 1 and :a stationary bottom cover plate frictionally engages the adjacent side of said rotor and ring opposite said cover plate.

3. The structure of claim 2 wherein said housing includes a top half and a bottom half, said rotor, ring `and bearing being disposed in said top half and said bottom plate being rigidly secured to said bottom half, said bottom plate having openings to provide communication between said cavities and said passageway, said rotor having a stub shaft opposite said drive shaft and embraced by a bearin-g in said bottom half.

References Cited UNITED STATES PATENTS Re. 17,326 6/1929 Bullard 91-71 1,210,042 12/1916 Bullard 103-121 1,961,592 6/1934- Muller 103-121 2,029,554 2/1936 Berggren 103-121 2,513,447 7/1950 Brown 103-121 FOREIGN PATENTS 646,407 11/ 1950 Great Britain.

DONLEY J. STOCKING, Primary Examiner.

W. J. GOODLIN, Assistant Examiner. 

